Sightings of humpback whales off Rio de Janeiro’s coast are surging as they recover from decimation due to commercial whaling, prompting an acceleration in the demand for whale-watching excursions to spot the huge marine creatures during their annual migration.

Recovery and Tourism

The species’ population has jumped from around 2,000 to around 35,000 in approximately 40 years, close to their population before whaling, said Enrico Marcovaldi, co-founder of the Humpback Whale Project. That means they are increasingly being spotted in Rio’s postcard Guanabara Bay.

Louise Raulais, who runs the Rio Ocean Club with her partner Theo Andrade, is among those who see the tourism opportunities in the whales’ resurgence. This year, the company began offering sailboat trips for between five and 10 people to observe the whales. Raulais said they always have a biologist onboard to share information, which can stimulate a desire to protect the whales and the ocean.

Humpback whales are known for roaming long distances across major oceans in predictable patterns, typically following migration routes learned from their mothers. They feed on krill and small fish in the warmer months and breed in tropical waters over winter.

Migration and Study

Between June and November, thousands of humpback whales migrate through Brazilian waters, traveling roughly 2,500 miles (4,000 kilometers) from their feeding grounds in the Southern Ocean to breeding and calving grounds off northeastern Brazil. Most gather around the Abrolhos Bank, a coral reef region spanning the coasts of Bahia and Espirito Santo that is one of the South Atlantic’s most biodiverse marine environments.

The Humpback Whale Project set up a scientific expedition, scheduled to run from June 26 to July 9, to study the humpback whales’ behavior, size and health, as well as identify their travel route, key gathering areas, and to measure how far offshore the whales pass.

Original reporting: WPBF (Treasure Coast / Hearst) — read the source article.